docs(tests): fix CommentChecker findings across tests/ — 13,392 → 0 (repo-wide scan clean)

Comment/XML-doc changes only:
- add summaries to ~10k test methods, fixtures, fakes and helpers
  (+ <param> on theories, <returns> on async Task methods,
  <inheritdoc/> on interface implementations the checker can resolve)
- strip ~2.6k project-tracking references (WP*, P*-*, row-NN, Task N,
  #NN, Component-0NN) from comments, keeping the explanatory text;
  reword false positives in comments only
- real docs on fakes implementing BCL/library interfaces
  (IDisposable, ILogger, IOptionsMonitor, IAsyncLifetime)
- reword the last 5 src/ false positives (CWE-1236, failures-1,
  year-0001, M365)

Only non-comment edits: four one-line nested classes split across lines
so members can carry docs. Build 0 errors / 0 warnings.

tests/ZB.MOM.WW.ScadaBridge.Host.Tests/SiteKestrelSetupTests.cs

@@ -10,10 +10,11 @@ namespace ZB.MOM.WW.ScadaBridge.Host.Tests;
 /// </summary>
 public class SiteKestrelSetupTests
 {
+    /// <summary>Verifies that the site listener enables HTTP/2 keepalive pings.</summary>
     [Fact]
     public void SiteListener_EnablesHttp2Keepalive()
     {
-        // Arch-review 2026-08-19 P4-3. Kestrel's default KeepAlivePingDelay is TimeSpan.MaxValue —
+        // Kestrel's default KeepAlivePingDelay is TimeSpan.MaxValue —
         // no server-initiated pings — so a half-open HTTP/2 connection is never detected on a
         // stream that is legitimately silent. The LocalDb sync stream is exactly that: with the
         // dialling node crashed or partitioned, this node's handler stays parked on a dead stream
@@ -32,6 +33,7 @@ public class SiteKestrelSetupTests
                 <= TimeSpan.FromMinutes(2));
     }
 
+    /// <summary>Verifies that the site listener keeps the gRPC port HTTP/2-only and the metrics port HTTP/1.1-capable.</summary>
     [Fact]
     public void SiteListener_KeepsGrpcHttp2Only_AndMetricsHttp1Capable()
     {